Tips on how to take care of my poor TEETH?

I just don't know what to do. My parents have spent thousands on my teeth, literally, between four root canals, crowns, and fillings in nearly all the other teeth (not to mention the cost of invisalign). Yes, I brush my teeth after every single meal, floss daily, and even use a perscription mouthwash, but what else can I do? I am 17, by the way.